多节段曲线形钢箱梁顶推施工技术  

INCREMENTAL LAUNCHING CONSTRUCTION TECHNOLOGY FOR CURVED MULTI-SEGMENT BOX GIRDER

作　　者：丰正伟[1] 燕鹏 林龙镔[1] FENG Zhengwei;YAN Peng;LIN Longbin(Department of Civil Engineering, Xiamen University Tan Kah Kee College, Zhangzhou 363105, China;Xiamen XGMA Heavy Industry Co. Ltd, Xiamen 361023, China)

机构地区：[1]厦门大学嘉庚学院土木工程系,福建漳州363105 [2]厦门厦工重工有限公司,福建厦门361023

出　　处：《钢结构》2017年第11期112-116,共5页Steel Construction

摘　　要：厦门市仙岳路主线桥L8联钢箱梁具有曲线形、节段多、路况复杂等特点,详细介绍顶推施工方案比选及多点单向、两次顶推钢箱梁的施工方法,通过对50 m悬臂时主梁腹板承载力验算提出了调整措施以确保局部稳定,运用ANSYS有限元软件分析墩顶滑移支点及与滑道梁接触处的受力状况。采用安装千斤顶和实时监测等方式解决钢梁和滑道脱空的技术难题,为钢箱梁顶推施工提供有力技术支持,保证了工程的顺利进行。The main bridge L8 steel box girder in Xiamen Xianyue Road has the characteristics of curved shape, multisegment, complex road conditions. The comparison of incremental launching scheme and the construction schemes of steel box girder about multiple points, single orientation, pushing twice were introduced in detail. The bearing capacity of girder web of 50 m cantilever was calculated, and the adjustment measures for ensuring the local stability were proposed. It analyzed the forces on piers top slipping points and the contact of slide beam by ANSYS finite element software. The jacks and real-time monitor were used to deal with the void between steel girder and slipway. These approaches could provide technical supports for the construction of steel box girders, and ensure that the progression of projects runing smoothly.

关 键 词：钢箱梁 多节段 顶推施工 曲线形 滑移支点 

分 类 号：U445.462[建筑科学—桥梁与隧道工程]